1. Benefiting to most user
2. Something which should be available to everybody like food, water and shelter
3. To be available irrespective of where you are... at least Earth as of circa 2009.
What are the service we can provide?
2. Voice or Video communication
Who would resist, Telecom service provider and who else?
Here is How?
1. Like GPS or more than GPS, launch 10s of GEO SYNC satellites specifically for Internet connectivity or use it for multipurpose.
2. Provide connectivity
3. Since VOIP and video OIP etc will kill Telecom player or they will transform into related service.
I just expressed my thoughts about this almost 2 years back to my friends and later I found Japan launched Satellites for Internet service and British also following... It seems not bad idea.